EpiPens should be stored at room temperature, between 68°F and 77°F, in a dark place where you can grab them quickly in an emergency. That balance of proper conditions and fast access is the core challenge of EpiPen storage, and getting it right protects both the medication’s potency and your safety.
The Right Temperature Range
The FDA-approved label for EpiPen specifies a storage temperature of 68°F to 77°F, with brief excursions allowed between 59°F and 86°F. In practical terms, this means a climate-controlled room in your home works perfectly. A kitchen drawer, a bedroom nightstand, or a hall closet are all reasonable choices as long as they don’t sit near a heat source like an oven or a sunny window.
Two extremes to avoid: refrigerators and freezers on one end, hot vehicles on the other. The manufacturer explicitly warns against refrigerating or freezing EpiPens. That said, a University of Utah study found that epinephrine vials frozen and thawed repeatedly over seven days, down to 13 degrees below zero, still maintained concentrations within safe limits. So if your EpiPen accidentally freezes during a winter hike, it’s likely still usable in a true emergency. But intentional cold storage isn’t recommended, and you should replace a frozen pen when you can.
Why Cars Are the Biggest Risk
Vehicles are the single most common place people accidentally ruin their EpiPens. Car interiors can reach nearly 144°F on hot days, and a 2019 study found that auto-injectors stored in vehicles may lose potency within hours. The worst spots are the glove compartment and the cabin shelf under the rear window, where temperatures climb fastest and highest. Heat doesn’t just weaken the epinephrine itself. It can also cause the auto-injector mechanism to malfunction, meaning the device might not fire correctly when you need it most.
If you need to keep an EpiPen in the car temporarily, use an insulated storage case and place it in the coolest part of the vehicle, typically on the floor behind the front seats. Never leave it in a parked car for extended periods during warm weather. In winter, bring it inside with you rather than leaving it overnight in a cold car.
Protect It From Light
Epinephrine degrades when exposed to light. This is why EpiPens come in a carrier tube, and you should keep the pen inside that tube until you need to use it. Store the tube away from direct sunlight, whether at home, in a bag, or at work. If the carrier tube is lost or damaged, keeping the pen inside a pouch, case, or drawer achieves the same protection.
Check the Viewing Window Regularly
Every EpiPen has a small clear window that lets you see the liquid inside. Get in the habit of checking it periodically, at least once a month and always before heading out. The solution should be clear and colorless. If it looks brown, pink, or discolored, or if you see particles or cloudiness floating in it, the epinephrine has degraded and the pen should be replaced. Also check the expiration date printed on the device. Expired pens lose potency over time, and while an expired pen is better than nothing in a life-threatening situation, you should always have a current one available.
Keep It Accessible, Not Hidden
Anaphylaxis can progress from first symptoms to a life-threatening reaction in minutes. Your EpiPen needs to be somewhere you (or someone helping you) can reach it immediately. At home, that means a consistent, known location rather than buried in a medicine cabinet behind other items. Tell household members where it’s kept.
At school or work, the same principle applies. State guidelines for schools and public entities require that epinephrine auto-injectors be stored in a location readily accessible in an emergency, following the device’s storage instructions. A locked office that’s closed on weekends defeats the purpose. If your child carries one at school, make sure staff know where it is and can access it without delay.
When you’re out, carry your EpiPen in a bag or pocket on your body rather than in a suitcase, backpack stored in a trunk, or someone else’s bag. Keep both pens from a two-pack together so a second dose is available if needed.
Traveling by Air With an EpiPen
The TSA allows EpiPens in both carry-on and checked bags. You should always pack them in your carry-on so they’re accessible during the flight and protected from the extreme cold of a cargo hold at altitude. You don’t need to remove them from your bag at security, but the TSA notes that you should declare medically necessary items at the checkpoint for inspection. Carrying your prescription label or a note from your doctor isn’t required by TSA policy, but it can speed things along if an officer has questions, especially when traveling internationally.
Cabin temperatures on planes are typically within the acceptable range for epinephrine storage. The bigger risk is the trip to the airport: don’t leave your EpiPen in a hot car in the airport parking lot while you fly.
How to Dispose of Used or Expired Pens
EpiPens are classified as sharps, the same category as medical needles. Even after use, most of the liquid remains inside the device, and the needle is exposed, so they can’t go in regular household trash. After using an EpiPen in an emergency, bring it with you to the emergency room or your doctor’s office. Medical facilities have sharps disposal containers and will handle it for you.
For expired, unused pens, take them to any location with sharps disposal capabilities: your doctor’s office, a pharmacy that accepts sharps, or a community sharps drop-off site. Many pharmacies offer take-back programs. Some communities also provide mail-back sharps containers. Your local waste management authority can point you to the nearest option if you’re unsure.